diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,11 @@
 # Changelog for biscuit-servant
 
+## 0.3.0.1
+
+- use biscuit-haskell 0.3.0.1
+- GHC 9.6 and 9.8 support
+- Generalize type for `withPriorityAuthorizer`
+
 ## 0.3.0.0
 
 - use biscuit-haskell 0.3.0.0
diff --git a/biscuit-servant.cabal b/biscuit-servant.cabal
--- a/biscuit-servant.cabal
+++ b/biscuit-servant.cabal
@@ -1,7 +1,7 @@
 cabal-version: 2.0
 
 name:           biscuit-servant
-version:        0.3.0.0
+version:        0.3.0.1
 category:       Security
 synopsis:       Servant support for the Biscuit security token
 description:    Please see the README on GitHub at <https://github.com/biscuit-auth/biscuit-haskell#readme>
@@ -13,7 +13,7 @@
 license:        BSD3
 license-file:   LICENSE
 build-type:     Simple
-tested-with:    GHC ==8.10.7 || == 9.0.2 || ==9.2.4
+tested-with:    GHC ==9.0.2 || ==9.2.4 || ==9.6.5 || ==9.8.2
 extra-source-files:
     README.md
     ChangeLog.md
@@ -36,9 +36,9 @@
     base                 >= 4.7 && <5,
     biscuit-haskell      >= 0.3 && < 0.4,
     bytestring           >= 0.10 && <0.12,
-    mtl                  ^>= 2.2,
+    mtl                  >= 2.2 && < 2.4,
     text                 >= 1.2 && <3,
-    servant-server       >= 0.18 && < 0.20,
+    servant-server       >= 0.18 && < 0.21,
     wai                  ^>= 3.2
   default-language: Haskell2010
 
diff --git a/src/Auth/Biscuit/Servant.hs b/src/Auth/Biscuit/Servant.hs
--- a/src/Auth/Biscuit/Servant.hs
+++ b/src/Auth/Biscuit/Servant.hs
@@ -305,8 +305,8 @@
 -- or to query a database), you can use 'withPriorityAuthorizerM' instead.
 withPriorityAuthorizer :: Functor m
                      => Authorizer
-                     -> WithAuthorizer m a
-                     -> WithAuthorizer m a
+                     -> WithAuthorizer' t m a
+                     -> WithAuthorizer' t m a
 withPriorityAuthorizer newV h@WithAuthorizer{authorizer_} =
      h { authorizer_ = (newV <>) <$> authorizer_ }